Warp stop-motion



J. REGAN.

WARP STOP MOTION.

APF'LICATION man APR. :5. I920.

Patented Sept. 14, 1920.

2 SHEETS-SHEET I.

J. REGAN.

. WARP STOP MOTION.

APPLICATION FILED APR.15, 1920.

1,352,529. K PatentedSept.14',1920.

2 SHEETS-SHEET 2- 'hvllllrllp VII/Illa JOHN REGAN, OF NEW BEDFORD,MASSACHUSETTS, ASSIGNOR TO CROMPTON &

KNOWLES LOOM 'WOBKS, OF WORCESTER,-

TION OF MASSACHUSETTS.

IvIASSACHUSETTS, A CORPORA- WARP STOP-MOTION.

Specification of Letters-Patents Application filed April 15, 1920.Serial No. 374,025.

This invention relates to a warp stop mo tion of the type shown in myprior Patent No. 1,365,121, of May 7, 1918;

in the practical operation of the patented stop motion, occasionalinstances have occurred in which a drop wire has been caught and held upby an adjacent drop wire.

This may occur when warp threads are passed through adjacent drop wiresfrom opposite sides, so that the wires tend to stand at opposed anglesinstead of in parallel relation. Under such conditions the slot in onewire may becaught over an upper corner of an adjacent wire and it willthen be impossible for the caught wire to drop even if its warp threadis broken.

it is the general object of my present invention to provide meanseffective to prevent such displacement of the drop wire, to the end thatevery drop wire may be maintain'ed at all times in operative position.My improved construction also possesses certain other advantages whichwill be hereinafter fully set forth.

A preferred form of my invention is shown in the drawings in whichFigure 1 is an end elevation of my improved stop motion; 2

Fig. 2 is a partial front elevation of the parts shown in Fig. 1;

Figs. 3 and a are diagrammatic end elevations showing the operation ofthe parts under different conditions;

5 shows the position of the drop wire and indicator bar under normalconditions, and s Fig. 6 shows the position of the same parts af ter thebreaking of a .warp thread.

The mechanism shown in the drawings is in general, substantially similarto that shown in my prior patent, and is mounted on a frame 10adjustably secured to a rod 11 fixed to the loom side (not shown). Theframe 10 is connected by bars 12 to a similar frame ,at the oppositeside of the loom, the bars being separated laterally to permit dropwires 13 to hang freely between them.

In Fig; 1, I have indicated a stop motion having two banks of drop wiresand requiring three connecting bars 12. The drop wires 13 may be variedsomewhat in design to suit different conditions but as shown in thedrawings are slotted at the lower end and are provided with openings 14each having a widelower portion'l l: and a narrow upper portionli". Anindicating bar 15 extends through the openings 14 in each bank of dropwires, being disposed in the wide lower portion 14 of the openings whenthe wires are in normal raised position. The bars 15' are preferably ofnon-circular cross section and each end of each bar is preferablysupported in a bearing block 16, mounted for angular movement in theframe 10.

At the operative end of the stop motion, each block 16 is provided witha down wardly extending arm 17 havin a stud or projection 18 atits lowerend. i look plate 20 is pivoted at 21. to the frame 10, and is held inoperative positionby a flange 22 resting upon a portion of said frame.hen

in operative position the plate 20 prevents longitudinal removal of theindicator bars-15.

The stud 18 extends through slots 24 in the slotted lowerend of a lever25, pivoted on a stud 26 carried by an arm 27. The arm 27 is mounted toswing on a pivot 28 fixed to the frame 10.

The lever 25 extends upwardly beyond the stud 26 and at its upper end isprovided with a stud 30 upon which is pivoted one end of a link 31through which the knock off mechanism is controlled.

The arm 27 is regularly oscillated throughan actuating link 32 by whichthe arm is connected to actuating mechanism not shown. The arm 27 alsosupports a PatentedSept. 14, 1920.

spring plunger 34 engaging a fiat face on Fig. The indicator bars 15 arethereby oscillated about the axes of the circular bearing blocks 16, andthis free oscillation of the indicating bars will continue so long asthe drop wires are all in the raised position shown in Fig. 5.

The principal novel feature of this application consists in providing astationary bar for each bank of drop wires, having supportn g bearingsin the end frames 10 and extending through the wide lower portion i ofthe drop wires, below the indicater bars 15.

The stationary bars 33 are preferably of a width substantially equal tothe width of th portions 1r of the openings in the drop wire This 33acts to preventsidewise movement of the drop wires, so that it isimpossible for the portion 14 of the opening 14k in any wire to becaught over an upper corner of its adjacent drop wire.

The operation of the stop motion on a warp break is as follows :Thecorresponddrop wire falls to the position shown in lg. (3, engaging theindicator bar 15 beiween the sides of the narrow portion 14* f theopening 1%. hen thus engaged furier oscillation of the bar 15 becomesimposaccordingly the arms 17 and studs are held in the fixed positionshown in l. he studs 18 then act as fixed pivots or the slotted lever:25, which swings about e studs 18 and moves the link 31 to the "ght orleft, as indicated in dotted lines in Such movement of the link 31causes the knock-off mechanism to operate and stop the loom.

lVhen a drop wire falls and prevents movement of the indicator bar 15,the stationary bar 33 furnishes a support for the drop wire somewhatcloser to the indicator har than the frame-bars l2, and thus enables thedrop wire to hold the indicator more positive manner. The bars 33 alsoact at times to prevent the warp threads from being raised against theindicator bars as the shed is opened, and thus prevent interference withthe oscillatory movement of the bars.

Intermediate supports, not shown, may be provided for the stationarybars 33 when necessary, particularly when the lease bars are so arrangedthat the lift of the warp is taken by the bars 33.

I have shown the bars 33 as having substantially the same cross-sectionas the bars 15, but the particular section is not imporant provided itis substantially equal in width to the portions 14 of the openings 14.

Having thus described my invention, it will be evident that changes andmodifications may be made therein by those skilled in the art, withinthe spirit and scope thereof as set forth in the claim, and I do notwish to be otherwise limited to the details herein disclosed, but what Iclaim is In a warp stop motion, a plurality of drop wires, each with anopening therein having a relatively wide lower portion, and a relativelynarrow upper portion, a normally movable indicator bar extending throughsaid openings and effective to engage both sides of said narrow portionof the opening in a fallen drop wire, yielding means to oscillatesaidindicator bar, and a stationary bar also extending through said openingbelow said indicator bar and having a Width substantiall; correspondingto the width of the wide lower portion of the opening in said drop wire.

In testimony whereof I have hereunto afiixed my signature.

ou a

JOHN REGAN.

